me.lua: Fix for potential future bug.
README.md: Better links.
config.lua: Added comments, links, removed unnecessary things.
greetings.lua: Default configuration now built in so as to not
crowd the config file.
.gitignore: wew lad
administration.lua: everything's better; automatic migration.
database.usernames -> database.users. View with /me.
Nicks and lastfm usernames moved to database.users; auto migrate.
Everything reworked and rewritten.
Antisquig is now a plugin to work with moderation.lua.
The bot can now upload photos, stickers, and other files.
Return values in plugin functions to affect the bot's behavior.
All this and more!
